Difference between the effect of SiO2 fiber and GeO2 fiber on the fiber parameters using Sellmeier formula. J. eng. sustain. dev. [انترنت]. 1 مارس، 2012 [وثق 19 مايو، 2024];16(1):232-44. موجود في: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1175